LS-Engine Swap Headers are designed specifically for the installation of an LS-series engine into a early GM vehicle. 1-3/4" to 2" standard or stepped tube headers are available in either HTC (Hi-Tech Coating), Ceramic-metallic coated (Black Maxx) or uncoated. Each set of headers comes with the required gaskets and bolts. Headers are designed to be used with Hedman Husler LS-Engine Swap Mount Kits.